I love this team so much because of the many different options that it has. I can take three approaches to a match. I determine which I want in the team preview. On to the team.
Politoed @ Sitrus Berry
EV(s): 220 HP, 96 Defense, 192 Special Defense
Bulky enough, and uses predictions so i really couldn't afford to carry protect. An interesting set of moves. I will go into these choices later.
Beartic @ Life Orb
Ability: Swift Swim
EV(s): 60 HP, 252 Attack, 196 Speed
When in rain he outspeeds and KOs Mega Salamence. However he is still very slow and under speeds Bisharp and Rotom out side of rain. Adds a nice surprise element to the team. Moves are pretty standard, but then again Beartic is not standard.
Gothitelle @ Leftovers
Ability: Shadow Tag
EV(s): 236 HP, 136 Defense, 136 Special Defense
Heal Pulse/ Thunder Wave
A key member to this team with the valuable Shadow Tag ability and Trick Room. Can't decide between Thunder Wave or Heal Pulse.
Aggron @ Aggronite
Ability: Sturdy --> Filter
EV(s): 252 Attack, 252 Special Defense, 4 HP
IV(s): 0 Speed
Rock Slide/ Ice Punch
The Mega of the team. I couldn't ask for anymore out of a Mega. Does great damage with Adamant max attack. Between Filter and the rain he essentially has no fire weakness. Iron Head is STAB. Aqua Tail is boosted in the Rain and is good coverage. Can't decide between Rock Slide and Ice Punch. In trick room Rock Slide will almost always go first and has a nice flinch chance. Ice Punch is Ice Punch. Min speed to excel in TR, and nail Aegislash in Blade form.
Sylveon @ Choice Specs
EV(s): 100 HP, 228 Defense, 180 Special Attack
Hidden Power (Ground)/(Ice)/(Fire)
EVs to survive Iron Head from Bisharp. Standard Moveset, can decide on my HP type right now, I've wished that I have had all. Still does great damage with Modest and Choice Specs.
Rotom-Heat @ Safety Goggles
EV(s): 252 HP, 96 Defense, 116 Special Defense, 44 Speed
A fairly standard set, except Thunder replaced Thunderbolt, allowing it to deal additional information and make the most of the Rain. Also me to kill Amoonguss, who is a threat.
I did not give very much information about the Pokemon, their Sets, their purpose, and how they fit into the team. I will post an answer (or 2) later on what their EV sets are for, teambuilding, leads, threatlist, and generally how the matches go.
Thank You for reading and make sure you stay tuned!